Add OPTIONS_DEFINE=DOCS for ports with %%PORTDOCS%% in the plist.
Where possible, correct a few instances where PORTDOCS was being used
to flag stuff in EXAMPLESDIR. For some ports, mostly those owned by
ruby@, PORTDOCS is applied to pretty much everything whether it's
documentation or example.

2 more ports: convert to USES+= zip
USES=zip is currently desired when all distfiles are zip archives, unless
the after-extraction arguments are tailored for ${TAR}. Currently
USES=zip is incompatible with multiple distfiles of different formats,
but this is being worked on.
Approved by: general infrastructure blanket

- Return my ports back to the pool. I was unable to make any fixes to
my ports in the past 3 weeks while ports were broken on any 10.x
machines, which means I'm unable to maintain them. So let people know
that there's no available support for them until things are back to
normal (which also means that anyone with spare time will be able
to fix them without getting approval).